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Day 333: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Atoms. Asked once: 31 Jan 2024 (same type asked 7 times) See all 7 of this type

    6
    If the wavelength of the first member of Lyman series of hydrogen is λ\lambda. The wavelength of the second member will be

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  2. Question 2

    Ray Optics. Asked once: 3 Apr 2025 (same type asked 7 times) See all 7 of this type

    18
    The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm . The refractive index of the lens material is.

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  3. Question 3

    Wave Optics. Asked once: 9 Apr 2024 (same type asked 7 times) See all 7 of this type

    118
    Monochromatic light of wavelength 500 nm500\text{ }nm is used in Young's double slit experiment. An interference pattern is obtained on a screen. When one of the slits is covered with a very thin glass plate (refractive index =1.5= 1.5 ), the central maximum is shifted to a position previously occupied by the 4th 4^{\text{th~}} bright fringe. The thickness of the glass-plate is ______ μm\mu m.

  4. Question 4

    Oscillations. Asked once: 2021 Paper 26 (same type asked 7 times) See all 7 of this type

    23
    A particle excutes S.H.M with amplitude ' aa ' and time period TT. The displacement of the particle when its speed is half of maximum speed is xa2\frac{\sqrt{x}a}{2}. The value of xx is

  5. Question 5

    Moving Charges and Magnetism. Asked once: 31 Jan 2024 (same type asked 7 times) See all 7 of this type

    21
    An electron moves through a uniform magnetic field B→=B0i^+2B0j^ T\overrightarrow{B}=B_{0}\widehat{i}+ 2B_{0}\widehat{j}\text{ }T. At a particular instant of time, the velocity of electron is u→=3i^+5j^ m/s\overrightarrow{u}= 3\widehat{i}+ 5\widehat{j}\text{ }m/s. If the magnetic force acting on electron is F→=5ekN\overrightarrow{F}= 5ekN, where ee is the charge of electron, then the value of B0B_{0} is _____ T.